The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2013
Filed:
Apr. 07, 2011
Applicants:
Christian Münnich, Leverkusen, DE;
Stephan Konrad, Dormagen, DE;
Karl-heinz Köhler, Aachen-Brand, DE;
Inventors:
Christian Münnich, Leverkusen, DE;
Stephan Konrad, Dormagen, DE;
Karl-Heinz Köhler, Aachen-Brand, DE;
Assignee:
Bayer Intellectual Property GmbH, Monheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 39/16 (2006.01); C07C 37/82 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is directed to a composition comprising a tris-hydroxyaryl compound having a metal ion impurity content of less than 10 ppm and to a process for the purification of tris-hydroxyaryl compound having a metal ion impurity, comprising at least the following steps: